• Country
• United States of America (USA)

• Manufacturer / Brand
• Atwater Kent Mfg. Co.; Philadelphia, USA

• Year
• 1931

• Category
• Car Radio, perhaps also + sound player/recorder

• Radiomuseum.org ID
• 18387

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 7

• Valves / Tubes
• 36 36 36 37 38 38 37

• Main principle
• TRF without regeneration

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries / 6 & 3x45 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Metal case

• from Radiomuseum.org
• Model: 81B Motor Car Radio - Atwater Kent Mfg. Co.;

• Shape
• Chassis only or for «building in»

• Notes

• Car radio running on storage and dry batteries; Not to be confused with the 81 console (in Bunis/Slusser).

• External source of data
• E. Erb 3-907007-36-0

• Circuit diagram reference
• Rider's Perpetual, Volume 3 = 1933 and before

• Mentioned in
• Beitman Radio Diagrams, Vol. 01, 1926-1938

• Other Models

• Here you find 507 models, 330 with images and 332 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Atwater Kent Mfg. Co.; Philadelphia, USA